Article
Chemistry, Physical
Kyeong Eun Song, Harald Schlegl, Hyunil Kang, Wonseok Choi, Jung Hyun Kim
Summary: The composition of layered perovskite SmBa0.5Sr0.5Co2O5+d was modified to different non-stoichiometric compositions by altering the substitution amount of Ba and Sr. SmBa0.45Sr0.5Co2O5+d (SBSCO-0.45/0.5) exhibited the lowest area specific resistance (ASR) due to its largest area % caused by high binding energy (HBE) of O1s in X-ray photoelectron spectroscopy (XPS) analysis and smaller unit cell volume compared to other compositions. SmBa0.5Sr0.48Co2O5+d (SBSCO-0.5/0.48), with the least decrease in oxygen content and the largest area % of Co3+ and Co4+ coexistence regions of Co2p in XPS analysis, showed the highest electrical conductivity. The electrical conductivity values and behaviors of porous SBSCO-0.45/0.5 and SBSCO-0.5/0.48 were not significantly different. Comparison between single-cell performances with composite cathodes of SBSCO-0.45/0.5 and SBSCO-0.5/0.48 with CGO91 revealed that the single-cell with SBSCO-0.45/0.5 and CGO91 cathode exhibited higher maximum power density.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Kyeong Eun Song, Sung Hun Woo, Seung Wook Baek, Hyunil Kang, Won Seok Choi, Jun Young Park, Jung Hyun Kim
Summary: In the SmBa1-xCaxCo2O5+d oxide systems, different compositions exhibited various electrical conductivity and metal-insulator transition behaviors. Among them, SBCCO-0.8 showed the highest electrical conductivity, while SBCCO-0.9 demonstrated excellent ASR characteristic at high temperature. The crystal structures of SBCCO were identified as orthorhombic, with unique X-ray diffraction peaks.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Ji Min Im, Kyeong Eun Song, Harald Schlegl, Hyunil Kang, Wonseok Choi, Seung-Wook Baek, Jun-Young Park, Hyun-Suk Kim, Jung Hyun Kim
Summary: In this study, the unique microstructure and electrical properties of SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite cathodes with dense and porous microstructures were analyzed by changing the applied current. It was observed that unique nanostructures were formed when a high current was applied to cathodes with both dense and porous microstructures of the same chemical composition for conductivity measurement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Ceramics
Ki Sang Baek, Seung-Wook Baek, Hyunil Kang, Wonseok Choi, Jun-Young Park, Stefan Saxin, Shin Ku Lee, Jung Hyun Kim
Summary: This study reports the electrical conductivity characteristics of SmBa0.5Sr0.5Co2O5+delta (SBSCO) and finds that sintering temperature and current range have an impact on its conductivity. Higher sintering temperature and lower current range result in higher electrical conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Kyeong Eun Song, Harald Schlegl, Chan Gyu Kim, Ki Sang Baek, Yu Ri Lim, Jung Hyun Nam, Hyun Suk Kim, Jung Hyun Kim
Summary: The electrical conductivity characteristics of SmBaCo2O5+d (SBCO) and SmBa0.5Sr0.5Co2O5+d (SBSCO) were studied by changing the microstructure characteristics. SBCO and SBSCO with dense microstructure showed different conductivity behaviors, while the porous cathode showed high semiconductor conductivity. The porous cathode exhibited higher conductivity when the measurement temperature was decreased.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Hongfei Chen, Zhe Lu, Zhipeng Liu, Yujie Wu, Shuai Wang, Zhihong Wang
Summary: Tuning the Fe-site element type of PrFeO3-delta through Sr and Nb co-doping enhances its anodic catalytic performance and maintains structural stability.
Article
Chemistry, Physical
Muhammad Rafaqat, Ghulam Ali, Naveed Ahmad, Syed Hassan Mujtaba Jafri, Shahid Atiq, Ghulam Abbas, Ghulam M. Mustafa, Rizwan Raza
Summary: This study reports the synthesis of La and Ba substituted X0.5Sr0.5Co0.8Mn0.2O3 and their investigation as a low temperature solid oxide fuel cell. The results show that the fuel cell based on LSCM cathode has significantly higher values of power density and open circuit voltage (VOC), indicating its potential for future applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Zujun Nie, Jingping Wang, Tian Xia, Guixiang Wang
Summary: A family of promising cathode materials Pr(1-x)Ca(x)Ba(0.94)Co(2)O(5+delta) is reported for efficient ORR activity and outstanding stability in intermediate-temperature solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Irina A. Ivanishcheva, Aleksandr V. Ivanishchev, Jae-Joong Kim, Young Je Kim, Su-Hyun Lee, Joon Ha Chang, Jung-Hoon Song, Sang-Cheol Nam
Summary: This work suggests a new strategy for the application of MAX phases in the cathode composite of LIBs with high nickel content. Two MAX phase candidates, TSC and TAC, were used as additives in the LiNi0.85Co0.10Mn0.05O2 cathode composite in an amount of 1% by weight. The structural and morphology changes during the modification process were monitored, and the optimal post-heat temperature of 400 degrees Celsius was found to enhance the cycling stability of the TSC composite electrode. The mechanism of MAX-phase influence on the electrochemical performance of the high Ni layered oxide electrode composite was explained based on the morphology of the MAX phases, oxidation stability evaluation, and electrode resistance measurements.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Applied
Yang Zhang, Binze Zhang, Hailei Zhao, Konrad Swierczek, Zhihong Du, Yuanyuan Li, Li Xu, Hui Li
Summary: Symmetrical solid oxide fuel cells (SSOFCs), with Mg-doped SmBaMn1.9Mg0.1O5+delta (SBMM) as electrode material, show high structure reversibility and good thermomechanical compatibility with LSGM electrolyte. The SBMM electrodes deliver a maximum power density of 596 mW cm(-2) in the supported symmetrical cell, demonstrating their high potential for SSOFC applications.
Article
Materials Science, Ceramics
Xiaowei Liu, Fangjun Jin, Ning Sun, Jiangxin Li, Yu Shen, Fang Wang, Jinhua Li
Summary: The study prepared NBC95+B composite cathode materials by introducing Nd defect with bismuth oxide, which effectively increased conductivity and reduced thermal expansion coefficient, showing good electrochemical performance.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Andrei I. Klyndyuk, Michal Mosialek, Dmitry S. Kharitonov, Ekaterina A. Chizhova, Malgorzata Zimowska, Robert P. Socha, Anna Komenda
Summary: Single- and double-doped YBa(Fe,Co,Cu)(2)O5+delta layered perovskites were prepared by solid state reaction method. The substitution of Co by Fe or/and Cu significantly improved thermal expansion properties, and the synthesized materials showed promising performance as cathode materials at intermediate temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xi Xu, Yangsen Xu, Jinming Ma, Yanru Yin, Marco Fronzi, Xianfen Wang, Lei Bi
Summary: The study demonstrates that tailoring the electronic structure of perovskite oxide with Mo-doping leads to improvements in cathode materials for proton-conducting solid oxide fuel cells. The Mo-doping changes the electronic structure of the oxide, making the metal-oxygen bond less strong and the surface more active towards oxygen reduction, resulting in more feasible oxygen vacancy formation critical for protonation. The electric field induced by Mo-doping provides an additional driving force for proton movement, accelerating proton migration in the oxide and improving cathode performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Nanoscience & Nanotechnology
Yunjie Gou, Guangdong Li, Rongzheng Ren, Chunming Xu, Jinshuo Qiao, Wang Sun, Kening Sun, Zhenhua Wang
Summary: This study demonstrates an effective optimized strategy for designing high-performance cathodes by doping Pr into BaFeO3-delta perovskites, enhancing electrochemical activity and CO2 resistance. The appropriate content of Pr substitution increases the oxygen vacancy concentration, promotes reactions on the oxygen electrode, and shows excellent electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chan Gyu Kim, Sung Hun Woo, Kyeong Eun Song, Seung-Wook Baek, Hyunil Kang, Won Seok Choi, Jung Hyun Kim
Summary: In this study, the electrochemical properties of non-stoichiometric layered perovskites were analyzed for their direct application as cathode materials in Intermediate Temperature-operating Solid Oxide Fuel Cells (IT-SOFC). The overall Area Specific Resistance (ASR) values decreased with increasing removal amount of Sm from x = 0-0.10, then increased for compositions at x = 0.15. Metal-insulator transition (MIT) electrical conductivity properties were observed in all compositions, with the temperature at which MIT occurred increasing as the non-stoichiometric composition increased.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Caleb J. Bennett, Helen E. A. Brand, Alexander K. L. Yuen, Maria K. Nicholas, Brendan J. Kennedy
Summary: The temperature dependence of the crystal structure of Potassium Hexaiodoplatinate(IV) between 80 and 500 K is studied. Different crystal structures are observed at different temperatures, including monoclinic, tetragonal, and cubic structures. Accurate determination of the structures of K2PtI6 is important for further theoretical and practical research.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhuo Zeng, Jiangfu Zheng, Xiaoming Li, Changzheng Fan, Rongying Zeng, Wenqing Tang
Summary: An efficient method for phosphate removal from wastewater is urgently needed due to the environmental issue caused by excessive phosphorus. In this study, calcium aluminum layered double hydroxides (CaAl-LDHs) and six amino acid intercalated calcium aluminum layered double hydroxides (CaAl-amino acid-LDHs) were prepared and compared for their phosphate adsorption performance. L-Aspartic acid intercalated calcium aluminum layered double hydroxides (CaAl-Asp-LDHs) exhibited the highest phosphate adsorption capacity and faster removal rate compared to CaAl-LDHs. The phosphate adsorption mechanism on CaAl-Asp-LDHs involved electrostatic attraction, hydrogen bonds, complexation, and ion exchange. This environmentally friendly material shows promising potential for efficient phosphate removal from aquatic environments.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rouzbeh Aghaei Hakkak, Thomas Schleid
Summary: The novel guanidinium hydro-closo-borates with [BnHn]2- (n = 10 and 12) anions were successfully synthesized via direct reaction. The crystal structures exhibit hydrogen bonding interactions and have the potential to facilitate H2 generation.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liqiang Ma, Pengpeng Wei, Jingfang Li, Liye Liang, Guangming Li
Summary: A novel catalyst, H4PVMo2W9O40@rht-MOF-1, was developed using a one-pot hydrothermal method. It exhibited high efficiency and reusability in esterification reactions.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liudmila A. Gorelova, Valentiva A. Yukhno, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin
Summary: Two new Ga-Ge disordered feldspar-related compounds were successfully synthesized using melt crystallization methods. Their stability and thermal expansion properties were studied under high-temperature conditions. The results showed that both compounds are stable within the studied temperature range and exhibit anisotropic thermal expansion.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Seifeddine Bdey, Nesrine Boussadoune, Francois Allard, Jacques Huot, Gabriel Antonius, Noura Fakhar Bourguiba, Pedro Nunez
Summary: The structure of a novel arsenate compound Na3Al3(AsO4)4 has been determined using X-ray diffraction. The crystal exhibits a monoclinic space group with suitable pathways for Na+ ion migration. The accuracy of the structural model was confirmed using various validation tools and density functional theory calculations.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Amit Kumar Atri, Ujwal Manhas, Sumit Singh, Irfan Qadir, Shikha Sharma, Preteek Sharma, Devinder Singh
Summary: This study synthesizes new oxygen deficient triple layered Ruddlesden-Popper (RP) phases via sol-gel method and investigates the effects of Cr3+ doping on their structural, optical, magnetic, and photocatalytic properties. The experimental results demonstrate that Cr3+ doping alters the interactions and leads to excellent photocatalytic performance in some phases.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Dat Le Thanh, Amandine Guiet, Emmanuelle Suard, Romain Berthelot
Summary: In this study, FeNb11O29 powder samples were prepared using a microwave-assisted solid-state synthesis method for the first time. The samples obtained rapidly from submicrometric oxide precursors showed enhanced cycling performance, possibly due to the easier ionic diffusion occurring in the smaller particles.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Raimund Ziegler, Felix R. S. Purtscher, Thomas S. Hofer, Gunter Heymann, Hubert Huppertz
Summary: We have successfully synthesized a new tellurium borate crystal under high-pressure and high-temperature conditions. The crystal structure and theoretical calculations have been thoroughly discussed.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Subhendu Jana, Eric A. Gabilondo, Paul A. Maggard
Summary: This study reports the synthesis and characterization of two previously unknown multinary selenides, Ba8Hf2Se11(Se-2) and Ba9Hf3Se14(Se-2), which display unique structures and optoelectronic properties competitive with existing perovskite-type chalcogenides.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Fei Ruan, Chonggui Lei, Fenglong Zhang, Jinxiao Bao, Fen Zhou, Min Xie, Pengfei Xu, Jianquan Gao
Summary: Studying the diffusion properties of hydrogen is important for designing new proton conductors. In the past, the chemical diffusion coefficient of hydrogen in proton conductors was usually obtained through a manual calculation method, resulting in difficulty in controlling the calculation accuracy. To address this issue, a mathematical algorithm and C language computer program were developed to calculate the chemical diffusion coefficient based on Fick's second law and Romberg numerical integral. The algorithm showed high precision and powerful computing function, and has the potential to replace the manual calculation method in calculating the chemical diffusion coefficient for hydrogen in proton conductors.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Deepika Shanubhogue, Suraj Mangavati, Ashok Rao, Ru-Ting Tsao, Yung-Kang Kuo
Summary: In this study, the effect of Y doping at the Sn-site on the structural, electrical, and low-temperature thermoelectric properties of the Cu2SnSe3 system is investigated. Y-doped compounds Cu2Sn1-xYxSe3 show reduced electrical resistivity, enhanced power factor, and decreased thermal conductivity, resulting in higher ZT values.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Wei Hong, Min Qing, Xun He, Lei Wang, Yu Pu, Qiyu Li, Zhimin He, Qin Dong, Rong Li, Xinglong Gou
Summary: This study developed a simple method to prepare SnS2 nanosheets and assembled them with MXene to form SnS2/MXene. The composite material exhibited abundant active sites, superior electron/ion transfer kinetics, and a unique 2D interlayer structure, resulting in high specific capacity, outstanding rate capability, and excellent cycling stability, with potential applications in LIBs.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Heng-Yu Ruan, Xue-Qian Wu, Tian-Yu Zhang, Yi Yuan, Le Wang, Ya-Pan Wu, Qing-Wen Han, Ruan Chi, Dong-Sheng Li
Summary: Two isostructural metalorganic frameworks (MOFs), CTGU-36-Co and CTGU-36-Ni, were synthesized, and CTGU-36-Ni demonstrated high activity as a molecular electrocatalyst for the methanol oxidation reaction.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rachid Fakhreddine, Ali Ouasri, Abderrahim Aatiq
Summary: This paper reports the synthesis, structure, and spectroscopic studies of three novel metal orthophosphate salts. The structures of these compounds were refined using X-ray powder diffraction data. The infrared and Raman analysis revealed their symmetries and the UV-visible investigation determined their optical properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
